I'm stuck... what is the answer to this equation?

3p + 2 ≥ -10

On a piece of paper graph f(x)=5•(0.4)^x

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Which value of y will make the inequality y< -1 false?